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Finding the Fourth Proportional to 792.12, 1,093.05 and 626.75

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Solution

The fourth proportional to 792.12, 1,093.05 and 626.75 is: 864.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.12 : 1,093.05 = 626.75 : x
  2. Step 2: Convert to fraction form
    792.12/1,093.05 = 626.75/x
  3. Step 3: Cross multiply
    792.12x = 1,093.05 × 626.75
  4. Step 4: Simplify right side
    792.12x = 685,063.62
  5. Step 5: Solve for x
    x = 685,063.62/792.12
  6. Step 6: Final answer
    x = 864.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.